Fabrication and evaluation result of a micro elliptical collimator lens for a beam shape form of Laser Diode

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Other Title
  • 半導体レーザ用ビーム形状整形コリメータレンズの製作と評価

Abstract

This paper describes a new fabrication process of a micro elliptical collimator lens to form a beam shape for LD(Laser Diode). Beam shape of LD is an ellipse because divergent light angle is different between horizontal and vertical direction, which increases a coupling loss with an optical fiber. In this presentation, we propose the lens to form the divergent light of an elliptical beam shape to the collimated light of a circular beam shape. For this purpose, we designed one lens, which has different curvature radiuses between the incident and the output surfaces. In the incident surface, the divergent light is formed to the convergent light, and the convergent light is formed to the collimated light in the output surface. We simulated the optical characteristic of this lens, and designed for various parameters. In order to fabricate this lens, we propose a new process using a chemically absorbed monomolecular layer, which has an excellent hydrophobic property. This layer is patterned and deposited by a photolithographic technique. Next, we drop a UV(Ultra Violet) cure material on the hydrophilic area, as the result, we can fabricate a micro elliptical lens shape. The curvature radius of this lens can be controlled by the amount of a dropped UV cure material and an elliptical pattern size in horizontal and vertical direction. The formed lens shapes are transferred by the electro–plating and then the micro dies are fabricated. And they are used for molding the plastic lens.

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Details 詳細情報について

  • CRID
    1390001205653156992
  • NII Article ID
    130005027685
  • DOI
    10.11522/pscjspe.2006s.0.931.0
  • Data Source
    • JaLC
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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